TOKYO--(BUSINESS WIRE)--We are pleased to announce that R-Tech Ueno (JASDAQ: 4573) will conduct a collaborative study with Tohoku University, a national university corporation, to develop a drug delivery system for Isopropyl Unoprostone (hereinafter referred to as Unoprostone), a compound made by R-Tech Ueno, using a sustained drug delivery system device (patent pending: International Publication No. WO2011/021594) invented by the study team of Prof. Toshiaki Abe M.D. et al., Division of Clinical Cell Therapy, United Centers for Advanced Research and Translational Medicine, Tohoku University, Graduate School of Medicine.